Office 365 Mail flow rules acting weird

Hey bucrepus,

Nothing looks off on your screenshot. I am guessing its something to do with handeling the "occurs at end of line ($)" wildcard for .us, and not the others for some reason. Clearly your syntax is right.

I cant say why that is not working, but let me offer maybe a solution to the problem?

Create another rule with a lower priority that looks for the string .us$, and try to add in something like a X-header. See if you can get that working. If so you can then add an exception to your rule and try it that way?

I would remove the .us conditon, and then create a new rule at a lower priority.

If that does not work, than clearly its just the syntax as a whole, and i think youll want to contact premier support to get them to take a look for you.

Good luck, Just know your syntax is on point, so its not anything obvious, and seems something more fundamentally wrong.

If you want us/me to look into it more, can you post an example header that is still getting caught/flagged, so we can look at the actual syntax of the message details.

Adam